Definition of "unbroadcast"

Later this month it will release what it calls a DVD “time capsule” with “60 Minutes” reports about Mr. Obama, unbroadcast interviews and two hours’ worth of his speeches.

2009 February 2, Brian Stelter, “To Relive the Inauguration, a Wave of Network DVDs”, in The New York Times‎

We must ensure when we promise anonymity that we are in a position to honour it, taking account of the implications of any possible court order demanding the disclosure of our unbroadcast material.

BBC Editorial Guidelines, quoted in 2014, Adele Emm, Researching for the Media: Television, Radio and Journalism (page 77)